TraceView: Center traces vertically after view creation

diff --git a/pv/view/view.cpp b/pv/view/view.cpp
index b5d7beb75d6845637fccb7e4fa1d6183e3b483a8..08dc8828357d0e704a45dc6782411024968a7381 100644 (file)
--- a/pv/view/view.cpp
+++ b/pv/view/view.cpp
@@ -156,7 +156,8 @@ View::View(Session &session, QWidget *parent) :
        trigger_markers_(),
        hover_point_(-1, -1),
        scroll_needs_defaults_(false),
-       saved_v_offset_(0)
+       saved_v_offset_(0),
+       size_finalized_(false)
 {
        connect(scrollarea_.horizontalScrollBar(), SIGNAL(valueChanged(int)),
                this, SLOT(h_scroll_value_changed(int)));
@@ -828,7 +829,7 @@ void View::set_scroll_default()
 
        // Special case: when starting up and the window isn't visible yet,
        // areaSize is [0, 0]. In this case we want to be called again later
-       if (areaSize.height() == 0) {
+       if ((areaSize.height() == 0) || (!size_finalized_)) {
                scroll_needs_defaults_ = true;
                return;
        } else {
@@ -974,15 +975,22 @@ void View::resizeEvent(QResizeEvent*)
        // set_v_offset() from within restore_settings() as the view
        // at that point is neither visible nor properly sized.
        // This is the least intrusive workaround I could come up
-       // with: set the vertical offset when the view is visible and
-       // resized to its final size. Resize events that are sent
-       // when the view is invisible must be ignored as they have
-       // wrong sizes, potentially preventing the v offset to be
-       // set successfully.
-       if (isVisible() && saved_v_offset_) {
+       // with: set the vertical offset (or scroll defaults) when
+       // the view is visible and resized to its final size.
+       // Resize events that are sent when the view is not visible
+       // must be ignored as they have wrong sizes, potentially
+       // preventing the v offset from being set successfully.
+
+       if (isVisible())
+               size_finalized_ = true;
+
+       if (size_finalized_ && saved_v_offset_) {
                set_v_offset(saved_v_offset_);
                saved_v_offset_ = 0;
        }
+
+       if (size_finalized_ && scroll_needs_defaults_)
+               set_scroll_default();
 }
 
 void View::row_item_appearance_changed(bool label, bool content)

diff --git a/pv/view/view.hpp b/pv/view/view.hpp
index 42cbe3c2155cb494d184330491b35f1c8ebf6e34..007ea3b68ba688395e0d20a87c25aea3cab30503 100644 (file)
--- a/pv/view/view.hpp
+++ b/pv/view/view.hpp
@@ -427,6 +427,8 @@ private:
 
        // A nonzero value indicates the v offset to restore. See View::resizeEvent()
        int saved_v_offset_;
+
+       bool size_finalized_;
 };
 
 } // namespace TraceView